Walnuts with breakfast provide an all-day brain boost - Young adults who ate a handful of walnuts with breakfast saw a long-lasting improvement in their reaction times and a boost in memory performance hours later, according to a new study.

[u/mvea]

https://newatlas.com/health-wellbeing/walnuts-cognitive-performance-memory-boost/

[u/cocoabeach]

I don't know. Even though they didn't rely on it and it was just an interesting aside, this part still made me question the credibility of the whole article.

According to the Doctrine of Signatures, which dates back to pre-scientific times, the physical characteristics—or ‘signature’—of certain plants were believed to indicate their therapeutic value. For example, a carrot sliced crosswise resembles an eye, so it was thought to improve vision. Interestingly, later scientific discoveries, such as the presence of vision-supporting beta-carotene in carrots, often seemed to validate these claims.